Some political analysts are doubtful that Athens will be willing to take on the Germans, who have provided more to the country's bailout package than any other European nation.
But while some such grand scheme may well be necessary, it's doubtful that it will be sufficient or that it will be politically sustainable before we've demonstrated to ourselves that change is possible.
Because of this, the researchers concluded that "it seems doubtful that women will be in demand for space roles in the very near future".
It seems doubtful that he will be sufficiently selfless or stupid to do that.
Whereas proponents of moral bioenhancement are optimistic about the status of current scientific research, opponents warn us that the complexity of our moral psychology and biology make it doubtful that we will be able to develop effective interventions.
Despite his high profile, it seems doubtful that Kaboudvand will be able to see his son and there is a real fear that he too will end up in hospital if his hunger strike continues for much longer.
And it seems doubtful that many will be able to raise the second and third installments of cash they had been counting on -- and that they will need for carrying out those ambitious business plans.
It's doubtful that this will be the last word on l'affaire Polanski.
It seems doubtful that Benazir Bhutto will be this contest's last notable victim.
"It is doubtful that hiring will be sustained at this pace for much longer," said Chris Williamson, chief economist at Markit.
